DE2536095A1 - Plastics cages for roller bearings - with slides for shaping the pockets which receive the rollers - Google Patents
Plastics cages for roller bearings - with slides for shaping the pockets which receive the rollersInfo
- Publication number
- DE2536095A1 DE2536095A1 DE19752536095 DE2536095A DE2536095A1 DE 2536095 A1 DE2536095 A1 DE 2536095A1 DE 19752536095 DE19752536095 DE 19752536095 DE 2536095 A DE2536095 A DE 2536095A DE 2536095 A1 DE2536095 A1 DE 2536095A1
- Authority
- DE
- Germany
- Prior art keywords
- pockets
- slide
- cage
- slides
- cages
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/44—Removing or ejecting moulded articles for undercut articles
- B29C45/4407—Removing or ejecting moulded articles for undercut articles by flexible movement of undercut portions of the articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/2628—Moulds with mould parts forming holes in or through the moulded article, e.g. for bearing cages
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/46—Cages for rollers or needles
- F16C33/4617—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages
- F16C33/4623—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages formed as one-piece cages, i.e. monoblock cages
- F16C33/4635—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages formed as one-piece cages, i.e. monoblock cages made from plastic, e.g. injection moulded window cages
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/46—Cages for rollers or needles
- F16C33/467—Details of individual pockets, e.g. shape or roller retaining means
- F16C33/4676—Details of individual pockets, e.g. shape or roller retaining means of the stays separating adjacent cage pockets, e.g. guide means for the bearing-surface of the rollers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/46—Cages for rollers or needles
- F16C33/4694—Single-split roller or needle cages
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/04—Bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/24—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/44—Needle bearings
- F16C19/46—Needle bearings with one row or needles
- F16C19/463—Needle bearings with one row or needles consisting of needle rollers held in a cage, i.e. subunit without race rings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2220/00—Shaping
- F16C2220/02—Shaping by casting
- F16C2220/04—Shaping by casting by injection-moulding
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
Verfahren zur Herstellung eines Kunststoffkäfigs für Wälzlager Es ist bereits ein Verfahren zur Herstellung eines Kunststoffkäfigs für Wälzlager bekannt (DT-DS 1 575 532), mit dem Käfige hergestellt werden können, die stärkere Halteleisten für die Wälzkörper aufweisen, was für viele Anwendungsfälle erwünscht ist. Bei diesem Verfahren, das wegen der erforderlichen Schieberbreite am besten bei Käfigen mit Doppeltaschen anwendbar ist, ist der Schieber dreigeteilt. Durch Schrägbolzen wird bei allen Schiebern zuerst das innere Teil radial nach außen gezogen, Dann werden die beiden äußeren Teile des Schiebers, die die Hinterschneidungen für die Ausformung der Halteleisten aufweisen, gegeneinander bewegt und erst danach wird der Schieber vollständig herausgezogen, indem die äußeren Teile vom Mittelteil nachgeschleppt werden. Method of manufacturing a plastic cage for rolling bearings Es a method for producing a plastic cage for roller bearings is already known (DT-DS 1 575 532), with which cages can be produced, the stronger retaining strips have for the rolling elements, which is desirable for many applications. With this one Method that is best for cages because of the required width of the slide Double pockets can be used, the slide is divided into three parts. By oblique bolts is with all slides first the inner part is pulled radially outwards, then the two outer parts of the slide, which are the undercuts for the molding have the retaining strips, moved against each other and only then is the slide fully pulled out by dragging the outer pieces from the middle section will.
Der Stärke der Halteleisten sind bei diesem Verfahren aber immer noch enge Grenzen gesetzt, da die äußeren Schieberteile nicht völlig von den ausgeformten Halteleisten freikommen und das Material keine Ausweichmöglichkeit hat.The strength of the retaining strips are still in this process There are narrow limits, as the outer slide parts are not completely different from the molded ones Retaining bars come free and the material has no alternative.
Der Erfindung liegt daher die Auf gabe zugrunde, ein Verfahren zur Herstellung von Kunststoffkäfigen für Wälzlager zu entwickeln, mit dem Käfige herstellbar sind, die eine starke Wälzkörperhalterung nach außen aufweisen und das auch zur Herstellung von Käfigen mit einfachen Taschen anwendbar ist.The invention is therefore based on the task of a method for To develop the production of plastic cages for roller bearings with which cages can be produced are that have a strong rolling element holder to the outside and that also for Making cages with simple pockets is applicable.
Diese Aufgabe ist durch die in Anspruch 1 genannte Erfindung geldst. Die Unteranspruche kennzeichnen vorteilhafte Weiterbildungen des Verfahrens. Die Nebenansprüche kennzeichnen eine besonders zweckmäßige Ausbildung der Vorrichtung zur Durchführung des Herstellungsverfahrens und eine mit diesem Verfahren und dieser Vorrichtung herstellbare vorteilhafte Käfigausfflhrung.This object is paid for by the invention mentioned in claim 1. The subclaims characterize advantageous developments of the method. the Ancillary claims characterize a particularly expedient design of the device to carry out the manufacturing process and one with this Advantageous cage design that can be produced using this method and device.
Die Erfindung wird nachfolgend anhand der Zeichnung erläutert.The invention is explained below with reference to the drawing.
Es zeigt: Fig. 1 einen Schnitt durch die Vorrichtung; Fig. 2 eine schematische Draufsicht auf die Vorrichtung zur Erläuterung des Verfahrens; Fig. 3 einen Ausschnitt eines Käfige mit angedeutetem Schieber und Wälzkdrper.It shows: FIG. 1 a section through the device; FIG. Fig. 2 a schematic plan view of the device for explaining the method; Fig. 3 shows a section of a cage with an indicated slide and rolling element.
Die Vorrichtung für die Herstellung eines Kunststoffkäfigs für Wälzlager besteht aus einem Grundkdrper 1 mit einem mittigen Formstück 2, um das herum der Käfig 3 ausgebildet wird. Die für die Aufnahme der Wälzkörper bestimmten Taschen werden während des Spritzvorgenges durch Schieber 4 ausgeformt. In die Haube 5 sind kranzförmig Schrfigbolzen 6 eingelassen, die in Bohrungen 7 in den Schiebern 4 eingreifen. Durch entsprechende Auf- und Abbewegungen der Haube 5 werden die Schieber in radialer Richtung nach außen bzw. innen bewegt.The device for the production of a plastic cage for roller bearings consists of a basic body 1 with a central molding 2, around which the Cage 3 is formed. The pockets intended to hold the rolling elements are formed by slide 4 during the injection process. In the hood 5 are Ring-shaped Schrfigbolzen 6 let in, which engage in bores 7 in the slides 4. By corresponding up and down movements of the hood 5, the slides become radial Moved towards the outside or inside.
An den Schiebern 4 sind Hinterschneidungen 8 angeformt, die zur Bildung der äußeren Halteleisten für die Wälzkörper an den Käigtaschen dienen (Figur 3). Damit die Schieberenden über die Halteleisten 8 hinweggezogen werden können, wird zuerst nur der Schieber 4, dann mit einer Verzögerung der im Uhrzeigersinn jeweils nächste Schieber 4' aus den Taschen des Käfige herausbewegt. Erreicht wird das dadurch, daß die entsprechend der Neigung der Schrägbolzen 6 schrägverlaufenden Löcher 7 im Schieber 4 bei den Schiebern 4' als im Uhrzeigersinn immer großer werdende Langlöcher 7' ausgebildet sind. Da die innere Begrenzung der Löcher 7, 7t konzentrisch angeordnet ist, entsprechend dem geschlossenen Zustand der Vorrichtung während des Ausformungszustandes, wird beim Anheben der Haube 5 ein Schieber nach dem anderen herausgezogen, entsprechend der spiralförmig verlaufenden äußeren Begrenzung der Löcher 7, 7', die beim Anheben der Haube den Anlagepunkt für die Schrägbolzen 6 bilden. Damit wird erreicht, daß nach dem Herausziehen des ersten Schiebers 4 beim Herausziehen der weiteren Schieber 4' das Material im Bereich der Halteleisten 8 seitlich zu der teilweise bereits freien Tasche ausweichen kann.On the slides 4 undercuts 8 are formed, which for the formation the outer retaining strips for the rolling elements on the cage pockets are used (Figure 3). So that the slide ends can be pulled over the retaining strips 8 first only the slide 4, then with a delay of the clockwise direction each next slide 4 'moved out of the pockets of the cage. This is achieved by that the corresponding to the inclination of the oblique bolts 6 holes 7 in the slide 4 with the slide 4 'as elongated holes that become larger and larger in the clockwise direction 7 'are formed. Since the inner boundary of the holes 7, 7t concentric is arranged, according to the closed state of the device during the Formed state, when the hood 5 is lifted, one slide after the other pulled out, corresponding to the spiraling outer boundary of the Holes 7, 7 ', which are the contact point for the oblique bolts 6 when the hood is lifted form. This ensures that after pulling out the first slide 4 when The further slide 4 ′ pulls out the material in the area of the retaining strips 8 can move sideways to the partially already free pocket.
Durch diese Maßnahme können die äußeren Halteleisten 8 kräftiger als bisher ausgeführt werden. Es ist auch möglich, sie nur auf einer Seite der Tasche oder unterschiedlich groß vorzusehen, was je nach Drehrichtung veränderte Laufeigenschaften bewirkt.By this measure, the outer retaining strips 8 can be stronger than have been carried out so far. It is also possible to have them only on one side of the bag or to be provided in different sizes, which changes the running properties depending on the direction of rotation causes.
In Figur 3 ist dargestellt, daß die Halteleiste 10 eine lippenartige Verlängerung aufweist, die den Wälzkörper 9 tangential überragt und damit als Schaufel für den Schmierstoff wirkt.In Figure 3 it is shown that the retaining strip 10 is lip-like Has extension that protrudes tangentially beyond the rolling element 9 and thus as a blade acts for the lubricant.
Bei der Herstellung eines großen Kunststoffkäfigs mit vielen Taschen kann es vorteilhaft sein, die durch die äußere Begrenzung der Langlöcher 7 gebildete Spirale zwei- oder mehrgängig auszuführen, das heißt, die jeweils gegenüberliegenden Schieber gleichzeitig herauszuziehen oder jeden vierten Schieber usw.When making a large plastic cage with lots of pockets it may be advantageous to use the one formed by the outer boundary of the elongated holes 7 Execute spiral two or more threads, that is, the opposite Pull out the sliders at the same time or every fourth slider etc.
Da bei der Herstellung eines geteilten Kunststoffkäfigs bei den bisher bekannten Herstellungsverfahren der Käfig an der Trennfuge häufig deformiert wurde, ist im Zusammenhang mit der vorliegenden Erfindung vorgesehen, daß die der Trennfuge 11 benachbarten Schieber 4 " und 4''' zuletzt entfernt werden, da der Käfig dann weiter ausgehärtet ist und auserdem-bei Entfernung der letzten Schieber die geringsten Zugkräfte auftreten. Weiterhin ist dabei von Vorteil, daß der Käfig beim Entfernen der vorhergehenden Schieber durch die Schieber 4 " und 4 " ' in seiner Lage gehalten wird.As in the production of a split plastic cage with the previously known manufacturing process the cage was often deformed at the parting line, is provided in connection with the present invention that the parting line 11 adjacent sliders 4 "and 4 '"' are removed last as the cage then is further hardened and also the least when the last slide is removed Tensile forces occur. Another advantage here is that the cage is removed when it is removed the previous slider by slider 4 "and 4" 'in its location is held.
Das dargestellte Beispiel bezieht sich auf die Herstellung eines Kunststoffkäfigs für Rollen- oder Nadellager. Bei Verlegung der Schieber in eine senkrecht zum gewählten Beispiel verlaufende Richtung, also axial, läßt sich das Verfahren auch bei der üblichen Herstellung von Kunststoffkäfigen für Kugellager anwenden.The example shown relates to the manufacture of a plastic cage for roller or needle bearings. When laying the slider in a perpendicular to the chosen one Example running direction, i.e. axially, the method can also be used in the the usual manufacture of plastic cages for ball bearings.
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19752536095 DE2536095A1 (en) | 1975-08-13 | 1975-08-13 | Plastics cages for roller bearings - with slides for shaping the pockets which receive the rollers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19752536095 DE2536095A1 (en) | 1975-08-13 | 1975-08-13 | Plastics cages for roller bearings - with slides for shaping the pockets which receive the rollers |
Publications (1)
Publication Number | Publication Date |
---|---|
DE2536095A1 true DE2536095A1 (en) | 1977-02-24 |
Family
ID=5953908
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19752536095 Withdrawn DE2536095A1 (en) | 1975-08-13 | 1975-08-13 | Plastics cages for roller bearings - with slides for shaping the pockets which receive the rollers |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2536095A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995002495A1 (en) * | 1993-07-14 | 1995-01-26 | Stefan Pfaff Werkzeug- Und Formenbau Gmbh & Co. Kg | Device for actuating slides in an injection moulding tool |
CN105643863A (en) * | 2014-11-14 | 2016-06-08 | 中国科学院金属研究所 | Injection-molding preparation method for plastic angular contact ball bearing retainer and special mold for injection-molding preparation method |
-
1975
- 1975-08-13 DE DE19752536095 patent/DE2536095A1/en not_active Withdrawn
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995002495A1 (en) * | 1993-07-14 | 1995-01-26 | Stefan Pfaff Werkzeug- Und Formenbau Gmbh & Co. Kg | Device for actuating slides in an injection moulding tool |
CN105643863A (en) * | 2014-11-14 | 2016-06-08 | 中国科学院金属研究所 | Injection-molding preparation method for plastic angular contact ball bearing retainer and special mold for injection-molding preparation method |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8141 | Disposal/no request for examination |